Windows 7 Powersaving
After upgrading Renee’s computer with powersavings in mind, I enabled the more aggresive powersavings options in Windows 7 RC. I also set it to sleep after 30 minutes of inactivity. Much to my surprise, the system kept waking itself up after a few minutes of sleep. WTF?!
I had suspected a device or the BIOS was the culprit. The event log wasn’t any help; all it noted was Windows had went to sleep, then woke up. Duh. A quick Google search revealed a command line utility powercfg, which can help point you to the last device which woke the system. By running powercfg -lastwake you can list the device which did just that. Nice!
Now I have a very nice system that scales back the CPU speed when not needed, then sleeps when it makes sense. Finally just like my Linux system! 
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